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Unbilled Receivables
3 Months Ended
Apr. 02, 2017
Contractors [Abstract]  
Unbilled Receivables
UNBILLED RECEIVABLES
Unbilled receivables represent revenue recognized on long-term contracts less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms or upon shipment of products or rendering of services. Unbilled receivables consisted of the following:
 
April 2, 2017
 
December 31, 2016
Unbilled revenue
$
25,979

 
$
25,543

Advances and progress billings
(21,422
)
 
(21,331
)
Net unbilled receivables
$
4,557

 
$
4,212